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Constitution and poetry

Ewa Łętowska

Nauka | 2017 | No 4 | 7-18

Keywords Constitution poetry civic rejection constitutionalism

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Abstract

This essay (given at the PENClub Polska) deals with the relationship between constitutional matters and poetry. The essay takes a closer look at the poetry of Adam Zagajewski, Marcin Świetlicki, Julian Tuwim and Adam Bieszek. “There is nothing on us in the Constitution” – Marcin Świetlicki angrily declaims the bitterness of civil rejection in the poem “Under the volcano”. However, the poet is not right. The Constitution sometimes means more than it says directly. If it is silent about something, that does not always amount to rejection, as Świetlicki claims. The two first parts of the essay explain why the poet could have made such a mistake as to his presence in the Constitution. The third part expounds the change that is taking place in Poland: the rejection of the foundations of the Constitution without changing its text.

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Ewa Łętowska

Mercury content in the rejects from the hard coal cleaning process and coal combustion by- products in respect of their utilization

Piotr Burmistrz Tadeusz Dziok Krzysztof Bytnar

Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi Polskiej Akademii Nauk | 2017 | Nr 98 | 115-124

Keywords hard coal mercury coal cleaning rejects coal combustion by-products

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Abstract

In the processes of coal mining, preparation and combustion, the rejects and by-products are generated. These are, among others, the rejects from the coal washing and dry deshaling processes as well as the coal combustion by-products (fly ash and slag). Current legal and industry regulations recommend determining the content of mercury in them. The regulations also define the acceptable content of mercury. The aim of the paper was to determine the mercury content in the rejects derived from the coal cleaning processes as well as in the combustion by-products in respect of their utilization. The mercury content in the representative samples of the rejects derived from the coal washing and dry deshaling processes as well as in the coal combustion by products derived from 8 coal-fired boilers was determined. The mercury content in the rejects from the coal washing process varied from 54 to 245 μg/kg, (the average of 98 μg/kg) and in the rejects from the dry deshaling process it varied from 76 to 310 μg/kg (the average of 148 μg/kg). The mercury content in the fly ash varied from 70 to 1420 μg/kg, (the average of 567 μg/kg) and in the slag it varied from 8 to 58 μg/kg (the average of 21 μg/kg). At the moment, in light of the regulations from the point of view of mercury content in the rejects from the coal preparation processes and in the coal combustion by-products, there are no significant barriers determining the way of their utilization. Nevertheless, in the future, regulations limiting the maximum content of mercury as well as the acceptable amount of leachable mercury may be introduced. Therefore, preparing for this situation by developing other alternative methods of using the rejects and by-products is recommended.

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Authors and Affiliations

Piotr Burmistrz

Tadeusz Dziok

Krzysztof Bytnar

Associations between value priorities and attitudes toward science

Józef Maciuszek Mateusz Polak Aleksandra Zajas Katarzyna Stasiuk

Polish Psychological Bulletin | 2020 | vol. 51 | No 4 | 237–243 | DOI: 10.24425/ppb.2020.135455

Keywords climate change values anti-science vaccine rejection creationism

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Abstract

The paper investigates the relations between Schwartz’s values and beliefs which may reflect skepticism toward science – specifically vaccine rejection, climate change denial and creationism. Recent research on the causes of anti-science indicates that they may be motivational, pertaining to ideologies, worldviews, and one’s moral codes. Therefore, we postulated that value priority hierarchies hierarchies may be predictors of anti-science. Results (N = 509) indicated that Conservation metatype values were positively associated with anti-science, while Self-Transcendence and Openness to change metatypes were connected with support for science. We also found significant differences in value profiles between participants with lower vs. higher anti-scientific beliefs. We discuss the possible motivational underpinnings of these results.

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Authors and Affiliations

Józef Maciuszek

Mateusz Polak

Aleksandra Zajas

Katarzyna Stasiuk

Institute of Applied Psychology, Jagiellonian University

Novel solutions on model-based and model-free robotic-assisted ankle rehabilitation

Juan Carlos Arceo Jorge Álvarez Carlos Armenta Jimmy Lauber Sylvain Cremoux Emilie Simoneau-Buessinger Miguel Bernal

Archives of Control Sciences | 2021 | vol. 31 | No 1 | 5-27 | DOI: 10.24425/acs.2021.136878

Keywords active disturbance rejection computed torque control differential algebraic equations parallel rehabilitation robot real-time implementation system identification

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Abstract

In this report, ankle rehabilitation routines currently approved by physicians are implemented via novel control algorithms on a recently appeared robotic device known as the motoBOTTE. The physician specifications for gait cycles are translated into robotic trajectories whose tracking is performed twofold depending on the availability of a model: (1) if obtained via the Euler-Lagrange approach along with identification of unknown plant parameters, a new computed-torque control law is proposed; it takes into account the parallel-robot characteristics; (2) if not available, a variation of the active disturbance rejection control technique whose parameters need to be tuned, is employed. A detailed discussion on the advantages and disadvantages of the model-based and model-free results, from the continuous-time simulation to the discrete-time implementation, is included.

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Authors and Affiliations

Juan Carlos Arceo

Jorge Álvarez

Carlos Armenta

Jimmy Lauber

Sylvain Cremoux

Emilie Simoneau-Buessinger

Miguel Bernal

Université Polytechnique Hauts-de-France, LAMIH UMR CNRS 8201, F-59313 Valenciennes, France
Sonora Institute of Technology, 5 de Febrero 818 Sur, Ciudad Obregon, Sonora, Mexico
Centre de Recherche Cerveau et Cognition, CNRS UMR 5549, Université de Toulouse, Toulouse 31052, France

Design of robust multi-loop PI controller for improved disturbance rejection with constraint on minimum singular value

R. Arun R. Muniraj S.R. Boselin Prabhu T. Jarin M. Willjuice Iruthayarajan

Archives of Control Sciences | 2023 | vol. 33 | No 4 | 839-859 | DOI: 10.24425/acs.2023.148884

Keywords multi-loop PI controller multivariable system decentralized control disturbance rejection robust stability

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Abstract

Disturbance rejection performance optimization with constraints on robustness for a multivariable process is commonly encountered in industrial control applications. This paper presents the tuning of a multi-loop Proportional Integral (PI) controller method to enhance the performance of load disturbance rejection using evolutionary optimization. The proposed design methodology is formulated to minimize the load disturbance rejection response and the input control energy under the constraints of robust stability. The minimum singular value of multiplicative uncertainty is considered a multi-loop system robust stability indicator. Optimization is performed to achieve the same, or higher level than the most-explored Direct Synthesis (DS) based multi-loop PI controller, which is derived from a conventional criterion. Simulation analysis clearly proved that the proposed multi-loop PI controller tuning method gives better disturbance rejection, and either, the same or a higher level of robust stability when compared to the DS-based multi-loop PI controller.

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R. Arun

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R. Muniraj

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S.R. Boselin Prabhu

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T. Jarin

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M. Willjuice Iruthayarajan

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Department of Electrical and Electronics Engineering, SriSivasubramaniya Nadar College of Engineering, Chennai, India
Department of Electrical and Electronics Engineering, P.S.R Engineering College, Sivakasi, India
Department ofElectronics and Communication Engineering, Surya Engineering College, India
Department of Electrical and Electronics Engineering, Jyothi Engineering College, Thrissur, India
Department of Electrical andElectronics Engineering, National Engineering College, Kovilpatti, India

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Constitution and poetry

Abstract

Authors and Affiliations

Mercury content in the rejects from the hard coal cleaning process and coal combustion by- products in respect of their utilization

Abstract

Authors and Affiliations

Associations between value priorities and attitudes toward science

Abstract

Authors and Affiliations

Novel solutions on model-based and model-free robotic-assisted ankle rehabilitation

Abstract

Bibliography

Authors and Affiliations

Design of robust multi-loop PI controller for improved disturbance rejection with constraint on minimum singular value

Abstract

Authors and Affiliations